While listening in class, you should concentrate your teacher.A. at B. to C. for D. on 题目和参考答案——青夏教育精英家教网—

题目内容

While listening in class, you should concentrate ____ your teacher.

A. at B. to C. for D. on

【解析】

试题分析: 句意：当你课上听讲时，你应该集中精力于你的老师。此题考查固定短语concentrate on精力集中于，根据句意，故选D。

考点：考查介词。

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3. Do you want to come? (同义句)

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5.对于学生来说，均衡营养非常重要。

___________ important for the students to a diet.

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C. do you D. don’t you

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